The spell checker and thesaurus are not underneath the view tab, so 1 and 2 are wrong.
If you replace every instance of the word gorgeous, then you would not be adding variety. So d is incorrect.
Therefore:
The only correct answer is C, as it is correct navigation and it adds word variety.
1.544Mb/s (megabits per second)
In radio communications, a narrowband channel is a channel in which the bandwidth of the message does not significantly exceed the channel's coherence bandwidth.
B. My mother goes running every day.
Well, I do school online, and would personally not recommend it. It's good for students who learn from visuals and reading something and understanding it, but for me, I don't do well with that. There are some like me who cannot be expected to read something and understand it without some form of help. I like hearing a teacher speak and explain with arm movements and gestures. With online school, you can't really have that, can you? Sorry, i'm really not trying to bash online schooling, it is a life saver for some, but i'm not one of those.